Chessington - any rides my 108cm 4yo can do unaccompanied? Or that I can do with her & 2yo DS

[Coveredinweetabix]

I'm taking my 108cm 4yo and 84ish cm 2yo to Chessington tomorrow (Monday). Are there any rides that either DD can do by herself or that I can do with both of them? I've just been on the little explorers map and there are very few rides that the 2yo can do so I was wondering if my 4yo would be able to do any by herself height wise and, if so, whether they are calm enough that she would be fine on it by herself.
She has been warned that tomorrow is about seeing animals rather than rides but it would be nice if there were a couple she could go on.
Thanks

In case anyone ever looks at this thread for info, I just thought I'd come back & say that the answer is yes. The rides marked with an "F" on the map were all suitable.
We got to the park at 10.30 and left at 4.30. We'd done all of the suitable rides (some a couple of times), been into the aquarium, seen the penguins be fed, been in the monkey enclosure, had lunch, been to the zoo, seen the sea lion show & the Madagascar show. We hadn't had time for the petting zoo or the playground or soft play.
There is a lot of walking so, if in doubt, take a pushchair.